Do I have to install my China travel eSIM before I leave home?

Buy the plan and install the profile on your home Wi-Fi before leaving. Check that it appears under Cellular or Mobile Data. Installation needs an internet connection, and providers' sites and apps are often unreachable in the mainland. Nomad says you cannot buy its eSIMs while physically in China (add-ons to an active plan still work); travellers also report difficulty reaching Airalo's app and website.

Apple's restrictions are narrower than travel blogs suggest. Its mainland eSIM page says a mainland-bought iPhone Air or iPhone 17e cannot install non-mainland carrier eSIMs while in the mainland. It also says iPhones bought elsewhere cannot install mainland-carrier eSIMs. Apple's international-travel page allows visitors to use prepaid travel eSIMs from worldwide providers. For an iPhone bought outside the mainland, the practical hurdles are reaching the provider and meeting its activation rules.

Vendors are tightening activation windows. CMLink (China Mobile's Hong Kong arm) requires its Global Data physical SIM, since 17 June 2026, to be switched on outside the mainland within 72 hours before entry; whether the same applies to its eSIM is not stated on its FAQ. Read your provider's activation rule before you fly.

Keep your home line active too. Many travel eSIMs are data-only; bank and booking SMS codes still arrive on your home number. Turn off data roaming on the home line so it doesn't bill you, and set the travel eSIM as the data line.

Do not expect a mainland eSIM as a fallback. Mainland carriers issue eSIMs to specific mainland-model phones only (Apple lists iPhone 17e and iPhone Air) after an in-store ID check, and iPhones bought outside the mainland cannot install a mainland-carrier eSIM. A travel eSIM is a different product and is not affected by that restriction.

Android: many China-market phones (Xiaomi, OPPO, vivo, Huawei among them) ship without usable eSIM; global-version phones (Pixel, Samsung, global Xiaomi) generally take travel eSIMs. Check your exact model in Settings and in the provider's compatibility list before buying.